A double-row cement-soil mixing pile machine and its application method

Abstract

This application relates to a double-row cement-soil mixing pile machine and its usage method, belonging to the field of cement-soil mixing pile machines. The double-row cement-soil mixing pile machine includes a pile machine body, a lifting assembly, and a mixing assembly. The lifting assembly is mounted on the pile machine body. The mixing assembly includes a mixing motor, a drilling pipe, a mixing tube, an impeller, and a fixing part. The mixing motor is connected to the lifting assembly. The drilling pipe is fixedly connected to the output shaft of the mixing motor and has grouting holes on its side wall. The mixing tube is located inside the drilling pipe and is rotatably connected to it. The side wall of the mixing pipe is hollow, and grouting holes are formed on its inner side wall. The impeller is located inside the side wall of the mixing pipe and is coaxially fixedly connected to it. One end of the grouting hole communicates with the part of the mixing pipe where the impeller is located, and the communication is sealed. The fixing part is used to fix the drilling pipe and the mixing tube. This application has the effect of reducing the energy consumption cost of cement-soil mixing pile machine construction.

Description

Technical Field

[0001] This application relates to the field of cement-soil mixing pile machines, and in particular to a double-row cement-soil mixing pile machine and its method of use. Background Technology

[0002] Cement-soil mixing piles are a type of soil mixing piles that use cement as the main curing agent. The cement is sprayed into the soil using a mixing pile machine and thoroughly mixed, causing a series of physical and chemical reactions between the cement and the soil. This process hardens the soft soil and increases the foundation strength, making it widely used for soil waterproofing.

[0003] Currently, a typical cement-soil mixing pile machine includes a mixing pile machine body, a lifting assembly, a mixing assembly, and a grouting assembly. The lifting assembly is mounted on the mixing pile machine body, and the mixing assembly is connected to the lifting assembly. The grouting assembly is mounted on the mixing assembly. The lifting assembly is used to raise and lower the mixing and grouting assemblies. The mixing assembly is used to drill pile holes in the soil layer and mix the cement slurry with the soil. The grouting assembly is used to inject the mixed cement slurry into the soil under pressure. In use, supported by the mixing pile machine body, the lifting assembly, mixing assembly, and grouting assembly are activated. The lifting assembly drives the mixing assembly to rise and fall, the mixing assembly drills holes in the soil layer, the grouting assembly injects cement slurry into the soil, and the mixing assembly mixes the soil and cement slurry, thus completing the construction of the cement-soil mixing pile.

[0004] The mixing unit is responsible for drilling and mixing during the construction of cement-soil mixing piles, while the grouting unit is responsible for injecting cement slurry into the soil. Thus, drilling, grouting, and mixing are all operated independently, which increases the energy consumption cost of the cement-soil mixing pile machine. Summary of the Invention

[0005] In order to reduce the energy consumption cost of cement-soil mixing pile construction, this application provides a double-row cement-soil mixing pile machine and its usage method.

[0006] In the first aspect, this application provides a double-row cement-soil mixing pile machine, which adopts the following technical solution:

[0007] A double-row cement-soil mixing pile machine, comprising:

[0008] Pile driver body,

[0009] A lifting assembly is mounted on the pile driver body;

[0010] A stirring assembly, comprising a stirring motor, a drilled tube, a stirring tube, an impeller, and a fixing part;

[0011] The stirring motor is connected to the lifting assembly;

[0012] The drill pipe is fixedly connected to the output shaft of the stirring motor, and a grouting hole is provided on its side wall;

[0013] The stirring tube is located inside the drilling tube and is rotatably connected to the drilling tube. The side wall of the stirring tube is hollow inside, and the inner side wall is provided with grouting holes.

[0014] The impeller is located inside the side wall of the mixing tube and is coaxially and fixedly connected to the mixing tube. One end of the grouting hole is connected to the part of the mixing tube where the impeller is located, and the connection is sealed.

[0015] The fixing part is used to fix the drilling pipe and the stirring pipe.

[0016] By adopting the above technical solution, the mixing component is brought close to the soil layer by the lifting component, and the drilling pipe and the mixing pipe are fixed by the fixing part. The mixing motor drives the drilling pipe to rotate. The drilling pipe, under the fixation of the fixing part, drives the mixing pipe to rotate. The drilling pipe and the mixing pipe are gradually penetrated into the soil layer under the action of the lifting component until the set depth of the cement-soil mixing pile is reached. Then the fixing part is released from the fixing of the drilling pipe and the mixing pipe, and the cement slurry is injected into the grouting hole under pressure. The cement slurry impacts the impeller from the grouting hole. The impeller drives the mixing pipe to rotate. The cement slurry flows into the interior of the mixing pipe from the grouting hole. The mixing pipe mixes the cement slurry and soil inside. Thus, the mixing of cement slurry and soil can be achieved by the pressure of cement slurry injection, so that the mixing motor does not need to provide driving force, reducing the energy consumption cost of the cement-soil mixing pile machine during construction.

[0017] Optionally, the lifting assembly includes a lifting plate, a lead screw, and a lifting motor. The lifting plate is slidably mounted on the pile driver body. Multiple lead screws are provided, all of which pass through the lifting plate and are threadedly connected to the lifting plate. Multiple lifting motors are provided, each corresponding to one of the lead screws. The lifting motors are fixedly connected to the pile driver body, and their output shafts are coaxially fixedly connected to the lead screws. The mixing motor is connected to the lifting plate.

[0018] By adopting the above technical solution, the lifting motor drives the lead screw to rotate, and the lead screw drives the lifting plate to move. Since the lifting plate is driven by multiple lead screws, the driving force on the lifting plate is increased, and the movement of the lifting plate is more stable, making it easier for the lifting plate to drive the stirring component.

[0019] Optionally, a torsion plate is rotatably connected to the lifting plate, and two sets of stirring components are provided. The stirring motors of the two sets of stirring components are fixedly connected to the torsion plate. A torsion cylinder is hinged to the lifting plate, and the piston rod of the torsion cylinder is rotatably connected to the edge of the torsion plate. The torsion cylinder is used to drive the torsion plate to rotate 90° during its full stroke.

[0020] By adopting the above technical solution, the torsion cylinder drives the torsion plate to rotate 90°, and the torsion plate drives the two mixing motors to rotate 90°, so that the positions of the two sets of mixing components are adjusted by 90°. This allows the pile driver body to mix four two-row cement-soil mixing piles in the same position after being fixed once, which improves the construction efficiency of cement-soil mixing piles and makes it easier to complete two rows of cement-soil mixing piles in the same position.

[0021] Optionally, a plurality of drilling blades are fixedly provided at the end of the drilling tube away from the stirring motor. The plurality of drilling blades are arranged around the axis of the drilling tube and together form a cone shape, with a gap between two adjacent drilling blades.

[0022] By adopting the above technical solution, the drilling pipe cuts the soil layer through multiple drilling blades when it rotates. The multiple conical drilling blades can easily break through the soil layer, making it easy for the drilling pipe to penetrate into the soil layer. At the same time, the spacing between adjacent drilling blades facilitates the entry of soil into the mixing pipe.

[0023] Optionally, multiple layers of stirring blades are fixedly arranged inside the stirring tube along the axial direction, with multiple stirring blades in each layer, and the multiple stirring blades are arranged around the axial direction of the stirring tube.

[0024] By adopting the above technical solution, when the mixing pipe rotates with the drilling pipe, the mixing blades inside the mixing pipe mix the soil entering the mixing pipe. When the mixing pipe rotates with the impeller, the mixing blades mix the soil and cement slurry, so that the soil can be pre-mixed before being mixed with the cement slurry. Pre-mixing makes it easier to break up the soil clods in the soil, thus making it easier to mix the soil and cement slurry evenly.

[0025] Optionally, a hole cover is hinged to the side of the grouting hole near the inside of the mixing tube, and a torsion spring is fixed between the hole cover and the side wall of the mixing tube. The torsion spring is used to drive the hole cover to fit tightly against the inner side wall of the mixing tube.

[0026] By adopting the above technical solution, the torsion spring makes the hole cover fit tightly against the mixing pipe. When the soil is being mixed, the soil inside the mixing pipe is not easy to enter the side wall of the mixing pipe from the grouting hole. When the pressure of the cement slurry inside the side wall of the mixing pipe is greater than the elastic force of the torsion spring and the pressure of the soil on the hole cover, the cement slurry flows into the interior of the mixing pipe from the grouting hole, thus ensuring that the grouting hole is easy to inject while preventing the grouting hole from getting blocked.

[0027] Optionally, the fixing part includes a fixing ring and multiple locking blocks. The fixing ring is coaxially arranged with the drilled tube. The multiple locking blocks are all located on one side of the fixing ring and are all fixedly connected to the fixing ring. The drilled tube has multiple first fixing grooves at one end near the stirring motor, and the stirring tube has multiple second fixing grooves at one end near the stirring motor. The first fixing grooves and the second fixing grooves are located on the sides of the drilled tube and the stirring tube that are close to each other and correspond to each other. The first fixing grooves and the second fixing grooves are connected. The locking blocks are adapted to the locking grooves formed by the first fixing grooves and the second fixing grooves. The locking blocks are used to insert into the first fixing grooves and the second fixing grooves to fix the drilled tube and the stirring tube.

[0028] By adopting the above technical solution, the locking block is inserted into the slot formed by the first fixing slot and the second fixing slot. The locking block acts as a locking device for the drilling pipe and the stirring pipe, making it difficult for the drilling pipe and the stirring pipe to rotate, and making it easier to fix the stirring pipe to the drilling pipe. Multiple locking blocks are connected by a fixing ring, which makes it easy for multiple locking blocks to be inserted into or pulled out of the first fixing slot and the second fixing slot at the same time, making it more convenient to fix the drilling pipe and the stirring pipe.

[0029] Optionally, the piling machine body is provided with two sets of fixing components, each of which corresponds to the mixing component. Each fixing component includes a first clamping rod and a second clamping rod. The first clamping rod and the second clamping rod intersect at the middle and are rotatably connected. A double-outlet hydraulic cylinder is hinged between one end of the first clamping rod and one end of the second clamping rod. The ends of the first clamping rod and the second clamping rod away from the double-outlet hydraulic cylinder are used to clamp and fix the drilling pipe.

[0030] By adopting the above technical solution, when the cement slurry drives the mixing pipe to rotate, the drilling pipe is positioned between the ends of the first clamping rod and the second clamping rod that are away from the double-outlet hydraulic cylinder. The two piston rods of the double-outlet hydraulic cylinder extend synchronously, and the ends of the first clamping rod and the second clamping rod that are away from the double-outlet hydraulic cylinder clamp the drilling pipe under the drive of the double-outlet hydraulic cylinder, so that the drilling pipe is easy to be fixed when the mixing pipe rotates.

[0031] Optionally, a push cylinder is connected to the rotatable connection of the first clamping rod and the second clamping rod. The push cylinder is fixedly mounted on the pile driver body, and the piston rod of the push cylinder is rotatably connected to the rotatable connection of the first clamping rod and the second clamping rod.

[0032] By adopting the above technical solution, the first clamping rod and the second clamping rod are moved by pushing the cylinder, so that the first clamping rod and the second clamping rod are less likely to affect the adjustment of the position of the two sets of stirring components.

[0033] Secondly, this application provides a method for using a double-row cement-soil mixing pile machine, employing the following technical solution:

[0034] A method for using a double-row cement-soil mixing pile machine includes the following steps:

[0035] Drilling: The lifting motor drives the lead screw to rotate, the lead screw drives the lifting plate to move, the fixing part fixes the drilling pipe to the mixing pipe, the lifting plate drives the mixing motor, the drilling pipe and the mixing pipe to approach the soil layer through the torsion plate, the mixing motor is started, the mixing motor drives the drilling pipe to rotate, the drilling pipe drives the mixing pipe to rotate, the soil enters into the mixing pipe and is mixed in the mixing pipe;

[0036] Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor is stopped, and the fixing part is released from the drilling pipe and the mixing pipe. Cement slurry is injected into the grouting hole under pressure. The cement slurry impacts the impeller from the grouting hole and flows into the inside of the mixing pipe from the grouting hole. The impeller drives the mixing pipe to rotate, and the mixing pipe mixes the soil and cement slurry inside.

[0037] Pipe outlet: The lifting motor drives the lead screw to move the lifting plate away from the soil layer;

[0038] Twist: Start the twist cylinder, the twist cylinder drives the twist plate to rotate, and the twist plate drives the two stirring motors and the drilling tube to rotate 90°;

[0039] Drilling: The fixing part fixes the drilling pipe to the mixing pipe. The lifting motor drives the lead screw to bring the lifting plate closer to the soil layer. The lifting plate drives the mixing motor, the drilling pipe, and the mixing pipe closer to the soil layer through the torsion plate. The mixing motor is started, and the mixing motor drives the drilling pipe to rotate. The drilling pipe drives the mixing pipe to rotate, and the soil enters the mixing pipe and is mixed inside the mixing pipe.

[0040] Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor is stopped, and the fixing part is released from the drilling pipe and the mixing pipe. Cement slurry is injected into the grouting hole under pressure. The cement slurry impacts the impeller from the grouting hole and flows into the inside of the mixing pipe from the grouting hole. The impeller drives the mixing pipe to rotate, and the mixing pipe mixes the soil and cement slurry inside.

[0041] By adopting the above technical solution, after the pile driver body is fixed, the position of the two sets of mixing components is adjusted by the torsion plate driven by the torsion cylinder. This allows the pile driver body to construct four cement-soil mixing piles in two rows after one fixing, realizing the synchronous construction of two rows of cement-soil mixing piles and improving the construction efficiency of cement-soil mixing piles. After the drilling pipe drives the mixing pipe into the soil layer, the fixing part is released from the fixing of the drilling pipe and the mixing pipe, and the cement slurry is injected into the grouting hole under pressure. The cement slurry impacts the impeller from the grouting hole, drives the impeller to rotate, and flows into the mixing pipe from the grouting hole. The mixing pipe mixes the soil and cement slurry, so that the mixing of soil and cement slurry can be achieved by the pressure of cement slurry injection, reducing the energy consumption cost of the cement-soil mixing pile machine.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] 1. By driving the impeller to rotate through cement slurry, and the impeller driving the mixing pipe to rotate, the mixing of soil and cement slurry does not require an additional driving source, thus reducing the energy consumption cost of cement-soil mixing pile machine;

[0044] 2. The torsion cylinder adjusts the position of the two sets of mixing components through the torsion plate, so that the pile driver body can construct four cement-soil mixing piles in two rows at one time, which improves the construction efficiency of cement-soil mixing piles.

[0045] 3. The first clamping rod and the second clamping rod are driven by a double-outlet hydraulic cylinder to clamp the drill pipe, so that the drill pipe can be easily fixed in a fixed state when the stirring tube rotates. Attached Figure Description

[0046] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0047] Figure 2 It is a cross-sectional view intended to illustrate the assembly relationship between the borehole tube and the mixing tube;

[0048] Figure 3 This is a schematic diagram intended to illustrate the structure of a drilling tool;

[0049] Figure 4 This is an exploded view designed to illustrate the assembly relationship between the orifice cover and the grouting hole;

[0050] Figure 5 This is a structural diagram intended to illustrate the fixing part;

[0051] Figure 6 yes Figure 1 A magnified view of point A in the middle.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Pile driver body; 2. Lifting assembly; 21. Lifting plate; 211. Torsion hole; 22. Lead screw; 23. Lifting motor; 3. Mixing assembly; 31. Mixing motor; 32. Drilling pipe; 321. Grouting hole; 322. Drilling blade; 323. First fixing groove; 33. Mixing pipe; 331. Grouting hole; 332. Mixing blade; 333. Hole cover; 334. Torsion spring; 335. Second fixing groove; 336. Connecting hole; 34. Impeller; 35. Fixing part; 351. Fixing ring; 352. Clamping block; 4. Torsion assembly; 41. Torsion plate; 42. Torsion cylinder; 5. Fixing assembly; 51. First clamping rod; 52. Second clamping rod; 53. Double-outlet hydraulic cylinder; 54. Push cylinder. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0055] This application discloses a double-row cement-soil mixing pile machine. (Refer to...) Figure 1 A double-row cement-soil mixing pile machine includes a pile machine body 1, a lifting component 2 and a mixing component 3. The lifting component 2 is installed on the pile machine body 1, and the mixing component 3 is installed on the lifting component 2. The lifting component 2 is used to drive the mixing component 3 to rise and fall, and the mixing component 3 is used to mix soil and cement slurry by means of the injection pressure of cement slurry.

[0056] In use, the pile driver body 1 is fixed at the construction position of the cement-soil mixing pile. The lifting component 2 drives the mixing component 3 to approach the soil layer until the mixing component 3 penetrates to the set depth of the cement-soil mixing pile. Pressurized cement slurry is injected, and the pressurized cement slurry drives the mixing component 3 to rotate. The mixing component 3 mixes the soil and cement slurry, thereby using the pressure of the cement slurry to drive the mixing component 3, which reduces the energy consumption cost of the cement-soil mixing pile driver.

[0057] Reference Figure 1 The pile driver body 1 is vertically arranged. The lifting assembly 2 includes a lifting plate 21, a lead screw 22 and a lifting motor 23. The lifting plate 21 is rectangular and horizontally arranged. One side of the lifting plate 21 along its length is slidably mounted on the pile driver body 1, and the sliding direction is vertical.

[0058] Multiple lead screws 22 are provided, all of which are vertically arranged and pass through the lifting plate 21. The lead screws 22 are threadedly connected to the lifting plate 21, and both ends of the lead screws 22 are rotatably connected to the pile driver body 1 in the axial direction.

[0059] Multiple lifting motors 23 are provided, each corresponding to a lead screw 22. The lifting motor 23 is located at the top of the pile driver body 1 and is fixedly connected to the pile driver body 1. The output shaft of the lifting motor 23 is coaxially fixedly connected to the lead screw 22.

[0060] When in use, start the lifting motor 23, which drives the lead screw 22 to rotate. The lead screw 22 drives the lifting plate 21 to move. Under the drive of multiple lead screws 22, the lifting plate 21 can move stably in the vertical direction.

[0061] Reference Figure 1 The lifting plate 21 is provided with a torsion assembly 4, which includes a torsion plate 41 and a torsion cylinder 42. The torsion plate 41 is circular and horizontally arranged. The lifting plate 21 is provided with a torsion hole 211 that is adapted to the torsion plate 41. The torsion hole 211 penetrates the thickness of the lifting plate 21. The torsion plate 41 is located in the torsion hole 211 and is rotatably connected to the lifting plate 21.

[0062] The torsion cylinder 42 is hinged to the top surface of the lifting plate 21. The piston rod of the torsion cylinder 42 is rotatably connected to the edge of the torsion plate 41. The extension and retraction direction of the torsion cylinder 42 is the same as the length direction of the lifting plate 21. When the piston rod of the torsion cylinder 42 moves from fully retracted to fully extended, the torsion plate 41 rotates 90°.

[0063] Reference Figure 1 and Figure 2 The stirring assembly 3 is provided in two sets, both sets of stirring assemblies 3 are located below the torsion plate 41. The stirring assembly 3 includes a stirring motor 31, a drilled pipe 32, a stirring pipe 33, an impeller 34 and a fixing part 35. The stirring motor 31 is fixedly connected to the torsion plate 41, and the output shaft is located at the end of the stirring motor 31 away from the torsion plate 41.

[0064] Reference Figure 1 The drill pipe 32 is a circular tube and is located below the stirring motor 31. The drill pipe 32 is vertically set and its top end is rotatably connected to the torsion plate 41. The drill pipe 32 is coaxially and fixedly connected to the output shaft of the stirring motor 31.

[0065] Reference Figure 3 The bottom end of the drill tube 32 is provided with multiple drill blades 322. The multiple drill blades 322 are arranged around the axis of the drill tube 32 and are tapered. One end of the drill blade 322 is fixedly connected to the bottom end of the drill tube 32, and the other end is fixedly connected to other drill blades 322. A gap is left between two adjacent drill blades 322.

[0066] Reference Figure 2 The stirring tube 33 is a circular tube and coaxially located inside the drilled tube 32. The outer diameter of the stirring tube 33 is equal to the inner diameter of the drilled tube 32, and the stirring tube 33 and the drilled tube 32 are rotatably connected. Multiple layers of stirring blades 332 are fixedly arranged on the inner wall of the stirring tube 33. The multiple layers of stirring blades 332 are arranged along the axial direction of the stirring tube 33, and each layer of stirring blades 332 has multiple blades, which are arranged around the axial direction of the stirring tube 33.

[0067] Reference Figure 2 and Figure 4 The mixing tube 33 has a hollow interior sidewall. Multiple grouting holes 331 are provided on the inner sidewall of the mixing tube 33 along both the circumferential and axial directions. The grouting holes 331 penetrate the inner sidewall of the mixing tube 33 and are circular. A cover 333 is provided at each grouting hole 331. The cover 333 is an arc-shaped plate located inside the mixing tube 33 and fits into the inner sidewall of the mixing tube 33. The top of the cover 333 is hinged to the mixing tube 33, and a torsion spring 334 is provided at the hinge. Both ends of the torsion spring 334 are fixedly connected to the cover 333 and the mixing tube 33, respectively. The torsion spring 334 is used to drive the cover 333 to fit tightly against the inner sidewall of the mixing tube 33.

[0068] Reference Figure 2 An impeller 34 is coaxially fixedly connected to the stirring tube 33. The impeller 34 is located at the bottom end of the stirring tube 33 and inside the side wall of the stirring tube 33. A connecting hole 336 corresponding to the impeller 34 is opened at the bottom end of the outer side wall of the stirring tube 33. The connecting hole 336 is annular and coaxially arranged with the stirring tube 33, and the connecting hole 336 penetrates the outer side wall of the stirring tube 33.

[0069] The top end of the drill pipe 32 is provided with multiple grouting holes 321. The multiple grouting holes 321 are arranged around the axis of the drill pipe 32. The grouting holes 321 are circular and their axis is the same as that of the drill pipe 32. The bottom end of the grouting hole 321 extends toward the mixing pipe 33 and communicates with the connecting hole 336. The connection between the grouting hole 321 and the connecting hole 336 is in a sealed state.

[0070] Reference Figure 2 and Figure 5 The top end of the drill pipe 32 is provided with multiple first fixing grooves 323, and the top end of the mixing pipe 33 is provided with multiple second fixing grooves 335. The first fixing grooves 323 penetrate the side of the drill pipe 32 near the mixing pipe 33, and the second fixing grooves 335 penetrate the side of the mixing pipe 33 near the drill pipe 32. The first fixing grooves 323 and the second fixing grooves 335 correspond one-to-one and are directly opposite each other. Both the first fixing grooves 323 and the second fixing grooves 335 are rectangular. The first fixing grooves 323 correspond one-to-one with the grouting holes 321, and the top end of the grouting holes 321 is located at the bottom of the first fixing grooves 323.

[0071] The fixing part 35 includes a fixing ring 351 and a locking block 352. The fixing ring 351 is circular and has a rectangular cross-section along the extension direction. Multiple locking blocks 352 are provided and correspond one-to-one with the first fixing groove 323. All locking blocks 352 are located on one side of the fixing ring 351 and are fixedly connected to the fixing ring 351. The locking blocks 352 are rectangular and their length direction is perpendicular to the plane where the fixing ring 351 is located.

[0072] The slot formed by the first fixing slot 323 and the second fixing slot 335 is adapted to the locking block 352, and the locking block 352 is engaged in the first fixing slot 323 and the second fixing slot 335.

[0073] In use, the fixing ring 351 and multiple locking blocks 352 are placed on the top of the drill pipe 32, and the locking blocks 352 are engaged in the slots formed by the first fixing groove 323 and the second fixing groove 335, so that the drill pipe 32 and the mixing pipe 33 are fixed. The mixing motor 31 is started, and the mixing motor 31 drives the drill pipe 32 to rotate. The drill pipe 32 drives the mixing pipe 33 to rotate. The lifting plate 21 drives the drill pipe 32 and the mixing pipe 33 to approach the soil layer. The drill pipe 32 breaks through the soil layer through multiple drilling blades 322, and the soil enters the mixing pipe 33 through the multiple drilling blades 322. During the rotation, the mixing pipe 33 mixes the soil through the mixing blades 332 until the drill pipe 32 reaches the set depth of the cement-soil mixing pile.

[0074] Remove the locking block 352 from between the first fixing groove 323 and the second fixing groove 335, release the fixing between the mixing pipe 33 and the drilling pipe 32, and inject the cement slurry into the grouting hole 321 under pressure. The pressurized cement slurry flows from the grouting hole 321 to the connecting hole 336 and impacts the impeller 34. The impeller 34 rotates under the impact of the pressurized cement slurry, and the impeller 34 drives the mixing pipe 33 to rotate. The cement slurry accumulates inside the side wall of the mixing pipe 33. When the pressure of the cement slurry inside the side wall of the mixing pipe 33 is greater than the elastic force of the torsion spring 334 and the pressure of the soil, the cement slurry flows into the interior of the mixing pipe 33 from the grouting hole 331. The mixing pipe mixes the cement slurry and soil through the mixing blades 332, and mixes the cement slurry and soil evenly. This allows the mixing of cement slurry and soil to be carried out with the help of the pressure of the cement slurry, which reduces the energy consumption cost of the cement-soil mixing pile machine.

[0075] The lifting plate 21 pulls the drill pipe 32 out of the soil layer, and then the torsion cylinder 42 is activated. The torsion cylinder 42 drives the torsion plate 41 to rotate 90°, so that the positions of the two drill pipes 32 rotate 90°. Then the above process is repeated, so that after the cement-soil mixing pile machine is fixed once, it can construct four cement-soil mixing piles in two rows, realizing the simultaneous construction of two rows of cement-soil mixing piles and improving the construction efficiency of cement-soil mixing piles.

[0076] Reference Figure 1 and Figure 6The piling machine body 1 is equipped with two sets of fixing components 5, which correspond one-to-one with two sets of mixing components 3 and are located on both sides of the drilling pipe 32. The fixing components 5 include a first clamping rod 51, a second clamping rod 52, and a double-outlet hydraulic cylinder 53. The first clamping rod 51 and the second clamping rod 52 intersect at the middle and are rotatably connected. The double-outlet hydraulic cylinder 53 is located between the ends of the first clamping rod 51 and the second clamping rod 52 away from the drilling pipe 32, and the two piston rods of the double-outlet hydraulic cylinder 53 are hinged to the first clamping rod 51 and the second clamping rod 52, respectively.

[0077] Reference Figure 6 A push cylinder 54 is connected to the rotating connection of the first clamping rod 51 and the second clamping rod 52. The push cylinder 54 is fixedly connected to the pile driver body 1, and the piston rod is rotatably connected to the rotating connection of the first clamping rod 51 and the second clamping rod 52. The extension and retraction direction of the push cylinder 54 is towards the drilling pipe 32.

[0078] In use, after releasing the locking block 352 from fixing the drill pipe 32 and the stirring pipe 33, the push cylinder 54 is activated to move the first clamping rod 51 and the second clamping rod 52 toward the drill pipe 32 until the drill pipe 32 is located between the first clamping rod 51 and the second clamping rod 52. Then, the double-outlet hydraulic cylinder 53 is activated. The two piston rods of the double-outlet hydraulic cylinder 53 drive the first clamping rod 51 and the second clamping rod 52 to rotate, so that the first clamping rod 51 and the second clamping rod 52 clamp and fix the drill pipe 32, making it easy for the drill pipe 32 to be in a stable fixed state when the stirring pipe 33 rotates.

[0079] The implementation principle of a double-row cement-soil mixing pile machine according to an embodiment of this application is as follows: During use, the lifting motor 23 is started, and the lifting motor 23 drives the lifting plate 21 to move towards the soil layer via the screw 22. The lifting plate 21 drives the torsion plate 41 and the drilling pipe 32 to move towards the soil layer, causing the locking block 352 to engage in the first fixed groove 323 and the second fixed groove 335. The mixing motor 31 is then started, driving the drilling pipe 32 to rotate. The drilling pipe 32 breaks through the soil layer through the drilling blade 322, allowing soil to enter the mixing pipe 33 until the drilling pipe 32 reaches the set depth of the cement-soil mixing pile. Then, the locking block 352 is removed from between the first fixed groove 323 and the second fixed groove 335, and the cement slurry is pressurized. The cement slurry is injected into the grouting hole 321 and impacts the impeller 34 through the connecting hole 336. The cement slurry causes the impeller 34 to rotate and flows into the mixing pipe 33 from the grouting hole 331. The impeller 34 drives the mixing pipe 33 to rotate, and the mixing blades 332 inside the mixing pipe 33 mix the cement slurry and soil. The pressure of the cement slurry drives the impeller 34 to rotate, reducing the energy consumption cost during the construction of cement-soil mixing piles. The lifting plate 21 pulls the drill pipe 32 out of the soil layer and starts the torsion cylinder 42. The torsion cylinder 42 drives the torsion plate 41 to rotate 90°, adjusting the position of the two drill pipes 32. This makes it easier for the cement-soil mixing pile machine to construct four cement-soil mixing piles in two rows after one fixing, improving the construction efficiency of cement-soil mixing piles.

[0080] This application also discloses a method for using a double-row cement-soil mixing pile machine, including the following steps:

[0081] Positioning: Fix the pile driver body 1 to the construction point of the cement-soil mixing pile;

[0082] Drilling: The lifting motor 23 drives the lead screw 22 to rotate, the lead screw 22 drives the lifting plate 21 to move, the fixing ring 351 drives multiple locking blocks 352 to be inserted into multiple first fixing slots 323 and multiple second fixing slots 335 at the same time, so that the drilling pipe 32 is fixed with the mixing pipe 33. The lifting plate 21 drives the mixing motor 31, the drilling pipe 32 and the mixing pipe 33 to approach the soil layer through the torsion plate 41. The mixing motor 31 is started, the mixing motor 31 drives the drilling pipe 32 to rotate, the drilling pipe 32 drives the mixing pipe 33 to rotate, the drilling pipe 32 breaks the soil layer through the drilling blade 322, and the soil enters the mixing pipe 33 through the gap between adjacent drilling blades 322. The mixing pipe 33 mixes the soil through the mixing blade 332.

[0083] Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor 31 is stopped, and multiple locking blocks 352 are removed from multiple first fixing slots 323 and multiple second fixing slots 335 through the fixing ring 351. The fixing of the drilling pipe 32 and the mixing pipe 33 is released, and the cement slurry is injected into the grouting hole 321 under pressure. The cement slurry flows from the grouting hole 321 into the connecting hole 336 and impacts the impeller 34. The cement slurry accumulates in the side wall of the mixing pipe 33 and the hole cover 333 is opened by pressure. The cement slurry flows from the grouting hole 331 into the interior of the mixing pipe 33. The impeller 34 drives the mixing pipe 33 to rotate, and the mixing pipe 33 mixes the soil and cement slurry inside through the mixing blades 332.

[0084] Pipe exit: The lifting motor 23 drives the lead screw 22 to move the lifting plate 21 away from the soil layer. The lifting plate 21 drives the torsion plate 41 away from the soil layer. The torsion plate 41 pulls the two drill pipes 32 out of the soil layer.

[0085] Twist: Start the twist cylinder 42, the twist cylinder 42 drives the twist plate 41 to rotate, the twist plate 41 drives the two stirring motors 31 and the drilling pipe 32 to rotate 90°;

[0086] Drilling: The fixing ring 351 drives multiple locking blocks 352 to be inserted into multiple first fixing slots 323 and multiple second fixing slots 335 simultaneously, so that the drilling pipe 32 and the mixing pipe 33 are fixed. The lifting motor 23 drives the lifting plate 21 to approach the soil layer through the drive screw 22. The lifting plate 21 drives the mixing motor 31, the drilling pipe 32 and the mixing pipe 33 to approach the soil layer through the torsion plate 41. The mixing motor 31 is started and drives the drilling pipe 32 to rotate. The drilling pipe 32 drives the mixing pipe 33 to rotate. The drilling pipe 32 breaks through the soil layer through the drilling blades 322. The soil enters the mixing pipe 33 through the gap between adjacent drilling blades 322. The mixing pipe 33 mixes the soil through the mixing blades 332.

[0087] Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor 31 is stopped, and multiple locking blocks 352 are removed from multiple first fixing slots 323 and multiple second fixing slots 335 through the fixing ring 351. The fixing of the drilling pipe 32 and the mixing pipe 33 is released, and the cement slurry is injected into the grouting hole 321 under pressure. The cement slurry flows from the grouting hole 321 into the connecting hole 336 and impacts the impeller 34. The cement slurry accumulates in the side wall of the mixing pipe 33 and the hole cover 333 is opened by pressure. The cement slurry flows from the grouting hole 331 into the interior of the mixing pipe 33. The impeller 34 drives the mixing pipe 33 to rotate, and the mixing pipe 33 mixes the soil and cement slurry inside through the mixing blades 332.

[0088] During use, after the pile driver body 1 is fixed, the lifting motor 23 drives the lifting plate 21 to move through the screw 22. The lifting plate 21 causes the two drilling pipes 32 to penetrate into the soil layer simultaneously, improving the construction efficiency of the cement-soil mixing pile. When the drilling pipe 32 reaches the set depth of the cement-soil mixing pile, the cement slurry is injected into the grouting hole 321 under pressure. The pressurized cement slurry impacts the impeller 34, and the force of the pressurized cement slurry drives the mixing pipe 33 to rotate. This allows the mixing of cement slurry and soil to be carried out with the help of the pressure of the cement slurry, reducing the energy consumption cost of the cement-soil mixing pile machine. The torsion cylinder 42 adjusts the position of the two drilling pipes 32 by driving the torsion plate 41, so that the cement-soil mixing pile machine can complete the construction of two rows of cement-soil mixing piles in one fixing, improving the construction efficiency of two rows of cement-soil mixing piles.

[0089] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-row cement-soil mixing pile machine, characterized in that, include: Pile driver body (1), Lifting assembly (2), which is mounted on the pile driver body (1); The stirring assembly (3) includes a stirring motor (31), a drilled pipe (32), a stirring pipe (33), an impeller (34), and a fixing part (35). The stirring motor (31) is connected to the lifting assembly (2); The drill pipe (32) is fixedly connected to the output shaft of the stirring motor (31), and a grouting hole (321) is provided on the side wall. The stirring tube (33) is located inside the drilling tube (32) and is rotatably connected to the drilling tube (32). The side wall of the stirring tube (33) is hollow and the inner side wall is provided with a grouting hole (331). The impeller (34) is located inside the side wall of the stirring tube (33) and is coaxially fixedly connected to the stirring tube (33). One end of the grouting hole (321) is connected to the part of the stirring tube (33) where the impeller (34) is located, and the connection is sealed. The fixing part (35) is used to fix the drilling tube (32) and the stirring tube (33); The lifting assembly (2) includes a lifting plate (21), a lead screw (22), and a lifting motor (23). The lifting plate (21) is slidably mounted on the pile driver body (1). Multiple lead screws (22) are provided and are all mounted on the lifting plate (21). The lead screws (22) are threadedly connected to the lifting plate (21). Multiple lifting motors (23) are provided and correspond one-to-one with the lead screws (22). The lifting motors (23) are fixedly connected to the pile driver body (1), and their output shafts are coaxially fixedly connected to the lead screws (22). The mixing motor (31) is connected to the lifting plate (21). A torsion plate (41) is rotatably connected to the lifting plate (21). Two sets of stirring components (3) are provided. The stirring motors (31) of the two sets of stirring components (3) are fixedly connected to the torsion plate (41). A torsion cylinder (42) is hinged to the lifting plate (21). The piston rod of the torsion cylinder (42) is rotatably connected to the edge of the torsion plate (41). The torsion cylinder (42) is used to drive the torsion plate (41) to rotate 90° in the whole stroke. The pile driver body (1) is provided with two sets of fixing components (5), which correspond one-to-one with the mixing component (3). The fixing component (5) includes a first clamping rod (51) and a second clamping rod (52). The first clamping rod (51) and the second clamping rod (52) intersect at the middle and are rotatably connected. A double-outlet hydraulic cylinder (53) is hinged between one end of the first clamping rod (51) and one end of the second clamping rod (52). The ends of the first clamping rod (51) and the second clamping rod (52) away from the double-outlet hydraulic cylinder (53) are used to clamp and fix the drilling pipe (32). A plurality of drilling blades (322) are fixedly provided at one end of the drilling tube (32) away from the stirring motor (31). The plurality of drilling blades (322) are arranged around the axis of the drilling tube (32) and together form a cone shape. There is a gap between two adjacent drilling blades (322). The stirring tube (33) is fixedly provided with multiple layers of stirring blades (332) along the axial direction inside. Each layer of stirring blades (332) is provided with multiple blades, and the multiple stirring blades (332) are arranged around the axial direction of the stirring tube (33).

2. The double-row cement-soil mixing pile machine according to claim 1, characterized in that, A hole cover (333) is hinged to the side of the grouting hole (331) near the inside of the stirring tube (33). A torsion spring (334) is fixed between the hole cover (333) and the side wall of the stirring tube (33). The torsion spring (334) is used to drive the hole cover (333) to fit tightly against the inner side wall of the stirring tube (33).

3. The double-row cement-soil mixing pile machine according to claim 1, characterized in that, The fixing part (35) includes a fixing ring (351) and multiple locking blocks (352). The fixing ring (351) is coaxially arranged with the drill pipe (32). The multiple locking blocks (352) are all located on one side of the fixing ring (351) and are all fixedly connected to the fixing ring (351). The drill pipe (32) has multiple first fixing grooves (323) at one end near the stirring motor (31), and the stirring pipe (33) has multiple second fixing grooves (335) at one end near the stirring motor (31). The first fixing groove (323) and the second fixing groove (335) are located on the side of the drill pipe (32) and the stirring pipe (33) that are close to each other and correspond to each other. The first fixing groove (323) and the second fixing groove (335) are connected. The locking block (352) is adapted to the locking groove formed by the first fixing groove (323) and the second fixing groove (335). The locking block (352) is used to insert into the first fixing groove (323) and the second fixing groove (335) to fix the drill pipe (32) and the stirring pipe (33).

4. The double-row cement-soil mixing pile machine according to claim 1, characterized in that, A push cylinder (54) is connected to the rotatable connection of the first clamping rod (51) and the second clamping rod (52). The push cylinder (54) is fixedly installed on the pile driver body (1). The piston rod of the push cylinder (54) is rotatably connected to the rotatable connection of the first clamping rod (51) and the second clamping rod (52).

5. The method of using the mixing pile machine according to any one of claims 1-4, characterized in that, Includes the following steps: drilling: The lifting motor (23) drives the lead screw (22) to rotate, the lead screw (22) drives the lifting plate (21) to move, the fixing part (35) fixes the drilling pipe (32) and the mixing pipe (33), the lifting plate (21) drives the mixing motor (31), the drilling pipe (32) and the mixing pipe (33) to approach the soil layer through the torsion plate (41), the mixing motor (31) is started, the mixing motor (31) drives the drilling pipe (32) to rotate, the drilling pipe (32) drives the mixing pipe (33) to rotate, the soil enters the mixing pipe (33) and is mixed in the mixing pipe (33); Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor (31) is stopped and the fixing part (35) is released from fixing the drilling pipe (32) and the mixing pipe (33). The cement slurry is injected into the grouting hole (321) under pressure. The cement slurry impacts the impeller (34) from the grouting hole (321) and flows into the mixing pipe (33) from the grouting hole (331). The impeller (34) drives the mixing pipe (33) to rotate. The mixing pipe (33) mixes the soil and cement slurry inside. Outlet pipe: The lifting motor (23) drives the lead screw (22) to move the lifting plate (21) away from the soil layer; Twist: Start the twist cylinder (42), the twist cylinder (42) drives the twist plate (41) to rotate, the twist plate (41) drives the two stirring motors (31) and the drilling pipe (32) to rotate 90°; Drilling: The fixing part (35) fixes the drilling pipe (32) to the mixing pipe (33). The lifting motor (23) drives the screw (22) to bring the lifting plate (21) close to the soil layer. The lifting plate (21) drives the mixing motor (31), the drilling pipe (32), and the mixing pipe (33) close to the soil layer through the torsion plate (41). The mixing motor (31) is started. The mixing motor (31) drives the drilling pipe (32) to rotate. The drilling pipe (32) drives the mixing pipe (33) to rotate. Soil enters the mixing pipe (33) and is mixed in the mixing pipe (33). Mixing: When the set depth of the cement-soil mixing pile is reached, the mixing motor (31) is stopped and the fixing part (35) is released from fixing the drilling pipe (32) and the mixing pipe (33). The cement slurry is pressurized and injected into the grouting hole (321). The cement slurry impacts the impeller (34) from the grouting hole (321) and flows into the mixing pipe (33) from the grouting hole (331). The impeller (34) drives the mixing pipe (33) to rotate, and the mixing pipe (33) mixes the soil and cement slurry inside.

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